Validation of the Dyspnea Exertion Scale of Breathlessness in People With Life-Limiting Illness

Research output: Contribution to journalArticle

Abstract

Background: Although chronic breathlessness is common in life-limiting illnesses, validated feasible instruments to measure functional impact of the symptom in this population are scarce. We aimed to validate the Dyspnea Exertion Scale (DES) compared with the modified Medical Research Council (mMRC) breathlessness scale for test-retest reliability, concurrent validity, and responsiveness in people with life-limiting illness. Methods: A total of 188 participants, 66% males, with chronic breathlessness, mostly (70%) because of chronic pulmonary disease (chronic obstructive pulmonary disease) self-reported evening scores of mMRC, DES, Numerical Rating Scale (NRS), and Eastern Cooperative Oncology Group during nine days. Results: About 44% (n = 81) scored the highest score on mMRC indicating a ceiling effect not seen with DES. Both scales had moderate-to-good test-retest agreement (89% DES; 84% mMRC; P < 0.001 for both). Analyses for concurrent validity showed that higher DES and mMRC scores were correlated with higher NRS breathlessness intensity scores and Eastern Cooperative Oncology Group scores throughout the nine days. In longitudinal analyses, DES (r = 0.30; P < 0.001) was more responsive to change in NRS score during nine days than the mMRC (r = 0.16; P = 0.03). Conclusion: Compared with mMRC, DES had comparable or better measurement properties in terms of test-retest reliability and concurrent validity and could be used as a discriminative tool in this population, but both scales are too insensitive to change to be used as an outcome in clinical trials.

Details

Authors
Organisations
External organisations
  • Hull York Medical School
  • University of Technology Sydney
Research areas and keywords

Subject classification (UKÄ) – MANDATORY

  • Respiratory Medicine and Allergy

Keywords

  • Breathlessness, DES, Dyspnea Exertion Scale (DES), measurement, Medical Research Council breathlessness scale, mMRC, validation
Original languageEnglish
Pages (from-to)430-435.e2
JournalJournal of Pain and Symptom Management
Volume56
Issue number3
Early online date2018 Jan 1
Publication statusPublished - 2018
Publication categoryResearch
Peer-reviewedYes